The non-profit, international organization Council on Tall Buildings 
and Urban Habitat (CTBUH) was formed in 1969 and announces the title of 
“The Worlds Tallest Building” and sets the standards by which buildings 
are measured. It maintains a list of the 100 tallest completed buildings
 in the world. The council currently ranks Burj Khalifa as the tallest 
at 828 m (2,717 ft).The CTBUH only recognizes buildings that are 
complete, however, and some buildings listed
 within these list articles are not considered complete by the CTBUH. 
Below is a detailed list of the 10 tallest buildings in the world.
10 Tallest Building In The World 2011-2012
Before we begin listing the 10 tallest skyscrapers individually we will show all 10 skyscrapers on a line graph(click image below to enlarge).
 
10 Tallest Building In The World 2011-2012
Before we begin listing the 10 tallest skyscrapers individually we will show all 10 skyscrapers on a line graph(click image below to enlarge).
1. Burj Khalifa
Country: Dubai, United Arab Emirates
Height: 828 m (2,717 ft)
Floors: 163
Cost Of Project: $1.5 Billion
Burj Khalifa known as Burj Dubai 
prior to its inauguration, is a skyscraper in Dubai, United Arab 
Emirates, and is currently the tallest structure in the world, at 828 m 
(2,717 ft). Construction began on 21 September 2004, with the exterior 
of the structure completed on 1 October 2009. The building officially 
opened on 4 January 2010, and is part of the new 2 km2 
(490-acre) flagship development called Downtown Dubai at the ‘First 
Interchange’ along Sheikh Zayed Road, near Dubai’s main business 
district. The tower’s architecture and engineering were performed by 
Skidmore, Owings and Merrill of Chicago, with Adrian Smith as chief 
architect, and Bill Baker as chief structural engineer.[10][11]
 The primary contractor was Samsung C&T of South Korea.The total 
cost for the project was about US$1.5 billion; and for the entire 
“Downtown Dubai” development, US$20 billion.\In
 March 2009, Mohamed Ali Alabbar, chairman of the project’s developer, 
Emaar Properties, said office space pricing at Burj Khalifa reached 
US$4,000 per sq ft (over US$43,000 per m²) and the Armani Residences, 
also in Burj Khalifa, sold for US$3,500 per sq ft (over US$37,500 per 
m²).2. Taipei 101
Country: Taipei, Taiwan
Height: 509 m (1,670 ft)
Floors: 101
Cost Of Project: $1.8 Billion
Taipei 101 , formerly known as the Taipei World Financial Center,
 is a landmark skyscraper located in Xinyi District, Taipei, Taiwan. The
 building ranked officially as the world’s tallest from 2004 until the 
opening of the Burj Khalifa in Dubai in 2010. In July 2011, the building
 was awarded LEED Platinum certification, the highest award in the 
Leadership in Energy and Environmental Design (LEED) rating system and 
became the tallest LEED building in the world. Taipei 101 was designed 
by C.Y. Lee & partners and constructed primarily by KTRT Joint 
Venture. The tower has served as an icon of modern Taiwan ever since its
 opening, and received the 2004 Emporis Skyscraper Award. Fireworks 
launched from Taipei 101 feature prominently in international New Year’s
 Eve broadcasts and the structure appears frequently in travel 
literature and international media.Taipei 101 comprises 101 floors above
 ground and 5 floors underground. The building was architecturally 
created as a symbol of the evolution of technology and Asian tradition 
(see Symbolism). Its postmodernist approach to style 
incorporates traditional design elements and gives them modern 
treatments. The tower is designed to withstand typhoons and earthquakes.
 A multi-level shopping mall adjoining the tower houses hundreds of 
fashionable stores, restaurants and clubs.3. Shanghai World Financial Center
Country: Shanghai, China
Height: 492 m (1,614 ft)
Floors: 101
Cost Of Project: $1.2 Billion
The Shanghai World Financial Center  is a supertall 
skyscraper in Pudong, Shanghai, China, developed by Mori Building. It 
was designed by Kohn Pedersen Fox. It is a mixed use skyscraper which 
consists of offices, hotels, conference rooms, observation decks, and 
shopping malls on the ground floors. Park Hyatt Shanghai is the hotel 
component containing 174 rooms and suites. Occupying the 79th to the 
93rd floors, it is the second highest hotel in the world, surpassing the
 Grand Hyatt Shanghai on the 53rd to 87th floors of the neighboring Jin 
Mao Tower. On 14 September 2007 the skyscraper was topped out[7]
 at 492.0 meters (1,614.2 ft) and became the second-tallest building in 
the world; as well as the tallest structure in the People’s Republic of 
China, including Hong Kong. It also had the highest occupied floor and 
the highest height to roof, two categories used to determine the title 
of “The World’s Tallest Building”.4. International Commerce Centre
Country: Hong Kong, China
Height: 484 m (1,588 ft)
Floors: 108
Cost Of Project: $3.85 Billion(estimate)
The International Commerce Centre is a 108 floor, 
484 m (1,588 ft) skyscraper completed in 2010 in West Kowloon, Hong 
Kong. It is a part of the Union Square project built on top of Kowloon 
Station. The development is owned and jointly developed by MTR 
Corporation Limited and Sun Hung Kai Properties, Hong Kong’s metro 
operator and largest property developer respectively. It is currently 
the world’s fourth tallest building as well as the tallest building in 
Hong Kong. Its formal development name is Union Square Phase 7 and the name International Commerce Centre
 was officially announced in 2005. International Commerce Centre was 
completed in phases from 2007 to 2010. The tower opened in 2011, with 
the Ritz-Carlton opening in late March and the observatory in early 
April.Sun Hung Kai Properties also developed, along with another major 
Hong Kong developer, Henderson Land, the second-tallest skyscraper in 
Hong Kong, the 2 International Finance Centre, which is located directly
 across Victoria Harbour in Central, Hong Kong Island.5. Petronas Towers
Country: Kuala Lumpur, Malaysia
Height: 452 m (1,483 ft)
Floors: 88
Cost Of Project: $1.6 Billion
The Petronas Towers are skyscrapers and twin towers 
in Kuala Lumpur, Malaysia. According to the CTBUH’s official definition 
and ranking, they were the tallest buildings in the world from 1998 to 
2004 until surpassed by Taipei 101, but remain the tallest twin 
buildings in the world. The building is the landmark of Kuala Lumpur 
with nearby Kuala Lumpur Tower. The Petronas Towers were the tallest 
buildings in the world for six years, until Taipei 101 was completed in 
2004. The height of the towers is measured to the top of their 
structural components such as spires, but do not include antennas. 
Spires are considered actual integral parts of the architectural design 
of buildings, to which changes would substantially change the appearance
 and design of the building, whereas antennas may be added or removed 
without such consequences. The Petronas Towers still remain the tallest 
twin buildings in the world.The Petronas Towers and the Kuala Lumpur 
Tower dominate the skyline of Kuala Lumpur’s Central Business 
District.The Petronas’s height compared to some other well-known tall 
structures Willis Tower (formerly Sears Tower) and the World Trade 
Center towers were each constructed with 110 occupied floors – 22 more 
than the 88 floors of the Petronas Towers. Willis Tower’s tallest 
antenna is 247.4 ft taller than those of the Petronas Towers, however, 
in accordance to CTBUH regulations and guidelines, the antennas of 
Willis Tower were not counted as part of its architectural features. The
 spires on the Petronas Towers are included in the height since they are
 not antenna masts. Therefore, the Petronas Towers exceed the official 
height of Willis Tower by 10 m.6. Nanjing Greenland Financial Center
Country: Nanjing, China
Height: 450 m (1,476 ft)
Floors: 89
Cost Of Project: $375 Million
The Nanjing Greenland Financial Center supertall 
skyscraper completed in April 2010 in Nanjing, China. The 89-story 
building comprises retail and office space in the lower section, and 
restaurants, a hotel, and a public observatory near the top. The tower’s
 stepping is functional, helping separate these sections. The mixed-use 
tower, which overlooks Xuanwu Lake, became the second tallest building 
in China and the 5th tallest building in the world when topped out in 
2008. An observation deck on the 72nd floor, 287 m (942 ft) above 
ground, provides an unobstructed, panoramic view of Nanjing and the 
nearby Yangtze River, two lakes and the Ningzheng Ridge mountains. 
Architectual firm Skidmore, Owings and Merrill designed the building led
 by Adrian Smith .7. Willis Tower
Country: Chicago, USA
Height: 442 m  (1,451 ft )
Floors: 108
Cost Of Project: $950 Million
The Willis Tower (formerly named, and still commonly referred to as the Sears Tower)
 is a 108-story, 1451-foot (442 m) skyscraper in Chicago, Illinois. At 
the time of its completion in 1973, it was the tallest building in the 
world, surpassing the World Trade Center towers in New York, and it held
 this rank for nearly 25 years. The Willis Tower is the tallest building
 in the United States and the fifth-tallest freestanding structure in 
the world, as well as the fifth tallest building in the world to the 
roof. Although Sears’ naming rights expired in 2003, the building 
continued to be called the Sears Tower for several years. In March 2009 
London-based insurance broker Willis Group Holdings, agreed to lease a 
portion of the building and obtained the building’s naming rights. On 
July 16, 2009, the building was officially renamed the Willis Tower.8. Guangzhou International Finance Centre
Country: Guangzhou, China
Height: 438 m (1,435 ft)
Floors: 103
Cost Of Project: $1.2 Billion
Guangzhou International Finance Centre or Guangzhou West Tower
 is a 103 story, 440.2 m (1,444 ft) tall skyscraper at Zhujiang Avenue 
West in Tianhe District at Guangzhou, China.The building was topped out 
at the end of 2008. Construction of the building, designed by Wilkinson 
Eyre, broke ground in December 2005. When complete, the building will be
 used as a conference centre, hotel and office building. Floors 1 to 66 
are used as office, floors 67 to 68 are mechanical equipment, floors 69 
to 98 as a Four Seasons Hotel and in floors 99 and 100 is an observation
 deck. The hotel lobby is located on the 70th floor. The building was 
completed in 2010. The building was previously known as Guangzhou West 
Tower and had a related project, the proposed Guangzhou East Tower 
which, at 475 m (1,558 ft), would have been even taller, though that 
project has been awarded to a different design by Kohn Pedersen Fox, the
 530 m (1,740 ft) tall Chow Tai Fook Centre.9. Trump International Hotel and Tower
Country: Chicago, USA
Height: 423 m (1,389 ft)
Floors: 98
Cost Of Project: $847 Million
The Trump International Hotel and Tower, also known as Trump Tower Chicago and locally as the Trump Tower,
 is a skyscraper condo-hotel in downtown Chicago, Illinois. The 
building, named after real estate developer Donald Trump, was designed 
by architect Adrian Smith of Skidmore, Owings and Merrill. Bovis Lend 
Lease built the 98-story structure, which reached a height of 1,389 feet
 (423 m) including its spire, its roof topping out at 1,170 feet 
(360 m). It is adjacent to the main branch of the Chicago River, with a 
view of the entry to Lake Michigan beyond a series of bridges over the 
river. The building received publicity when the winner of the first 
season of The Apprentice television show, Bill Rancic, chose to
 manage the construction of the tower. Trump announced in 2001 that the 
skyscraper would become the tallest building in the world, but after the
 September 11, 2001 attacks, the building plans were scaled back, and 
its design underwent several revisions. When topped out in 2009 it 
became the second-tallest building in the United States after Chicago’s 
Willis Tower (formerly known as the Sears Tower). It is expected to be 
surpassed by One World Trade Center in New York City in the middle of 
2013. Trump Tower surpassed Chicago’s John Hancock Center as the 
building with the world’s highest residence above ground-level and held 
this title until the completion of the Burj Khalifa. As of 2011 it is 
the tenth-tallest building in the world.10. Jin Mao Tower
Country: Shanghai, China
Height: 421 m (1,380 ft)
Floors: 88
Cost Of Project: $530 Million
The Jin Mao Tower is an 88-story landmark supertall 
skyscraper in the Lujiazui area of the Pudong district of Shanghai, 
People’s Republic of China. It contains offices and the Shanghai Grand 
Hyatt hotel. Until 2007 it was the tallest building in the PRC, the 
fifth tallest in the world by roof height and the seventh tallest by 
pinnacle height. Along with the Oriental Pearl Tower, it is a 
centerpiece of the Pudong skyline. Its height was surpassed on September
 14, 2007 by the Shanghai World Financial Center which is next to the 
building. The Shanghai Tower, a 128-story building located next to these
 two buildings and now under construction, will be even taller.